/*
 * Copyright (c) 2010, German Buela
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * The name of German Buela may not be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY GERMAN BUELA "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL GERMAN BUELA BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.gbuela.swt

import org.eclipse.swt.widgets._
import org.eclipse.swt.graphics._
import org.eclipse.swt.events._
import org.eclipse.swt._

object HLabel {
  val listener = new MouseEnterExitListener
  val hoverColor = SWT.COLOR_TITLE_INACTIVE_BACKGROUND_GRADIENT
  val clickColor = SWT.COLOR_TITLE_BACKGROUND_GRADIENT
  var handCursor:Cursor = null
  
  val fontData = new FontData()
  fontData.setHeight(12)
  
}
class HLabel(parent:Composite, text:String, clickHandler: => Unit) {
   val font = new Font(parent.getDisplay, HLabel.fontData)
  
   val clickListener = new MouseClickListener(clickHandler)
   val lbl = new Label(parent, SWT.NONE)
   lbl.setText("  " + text.replace("&","&&") + "  ")
   lbl.setFont(font)
   lbl.addMouseTrackListener(HLabel.listener)
   lbl.addListener(SWT.MouseDown, clickListener)
   lbl.addListener(SWT.MouseUp, clickListener)
   if(HLabel.handCursor == null)
   {
     HLabel.handCursor = new Cursor(parent.getDisplay, SWT.CURSOR_HAND)
   }
   lbl.setCursor(HLabel.handCursor)
}

class MouseEnterExitListener extends MouseTrackListener
{
  override def mouseEnter(e:MouseEvent):Unit = {
    e.display.syncExec(new Runnable() {
    	override def run = {
          val c = e.getSource.asInstanceOf[Label]
          c.setBackground(e.display.getSystemColor(HLabel.hoverColor))
    	}
   })
  }
  override def mouseExit(e:MouseEvent):Unit = {
    e.display.syncExec(new Runnable() {
    	override def run = {
          val c = e.getSource.asInstanceOf[Label]
          c.setBackground(e.display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND))
    	}
   })
  }
  override def mouseHover(e:MouseEvent):Unit = {}
}

class MouseClickListener(handler: => Unit) extends Listener {
  var clickedObj:Control = null
  
  override def handleEvent(e:Event):Unit = e.`type` match {
    case SWT.MouseDown => 
      clickedObj = e.widget.asInstanceOf[Control]
      clickedObj.setBackground(e.display.getSystemColor(HLabel.clickColor))
    case _ =>
      if(clickedObj != null)
      {
        clickedObj.setBackground(e.display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND))
      }
      if(e.widget == clickedObj)
      {
        
      }
      clickedObj.setBackground(e.display.getSystemColor(HLabel.hoverColor))
      handler
  }
}
